Today-I-Learned-Blog

Namespace, Class and Methods

If you are new to C# or have forgotten the difference between namespaces, classes and methods, here is a handy analogy.

Like an address, method name is the street address, class name is the city and namespace is the state.

Namespaces, Classes and Methods organize code in C#
Reading a Method call from right to left: Namespace.Class.Method
For System.Console.write:
- The method name is “write”
- The class name is “Console”
- System is the namespace containing the class Console
Classes are contained in namespaces
Namespaces make it possible to have multiple classes with the same name because each class name remains in the namespace
Put the Class Program in the namespace NASA…
Namespaces can have multiple levels such as company name, then partition the namespace into smaller namespaces by dots (.), eg NASA.Planets.Saturn
A Using Directive reduces typing and makes the code more readable.
A “Using Directive” reduces constant writing out of the namespace by putthing the namespace at the top of the code page, using System;
Place as many Using Directives as needed at the top of the code page.

namespace Nasa
{
  class Planets
  {
    ...
  }
}